adjective of, concerning, or caused by motion.Windmills are used to harness the kinetic energy of the wind. See the full entry

With the Wordsmyth Vocabulary Center activities, you can study these words, play games with them, and assess your knowledge of their meanings with a quiz. Go to the Vocabulary Center, the words…

transitive verb to validate, confirm, or establish (something) by giving formal approval or consent.The legislature must ratify the treaty before it goes into effect. See the full entry

noun that which preoccupies one’s mind or emotions excessively or abnormally.She no longer cared about money and success in and of themselves; surpassing her sister in every way was now her obsession.His…

adjective overly excitable or irritable. changeable as to mood, nature, operability, or the like; unpredictable.The weather is temperamental in the early spring; we may have snow one day and warm air and…